Yes, this would be about Medium Beginner.
You move every joint in every frame, but it's mainly your spacing that needs work. There isn't really any easing to show change in speed. You either change it in one frame, which makes it look really sudden and not very appealing, or don't change it. Make sure to change your speed over a series of different frames, and this way you'll get a more smoother looking animation. I think what's happening is you're trying to ease, but when you do it is very small and very fast. This usually looks best on powerful attack moves, but even then you've got to be careful.
My best advice is to click through the frames, and keep checking your spacing and ask yourself if this is changing way too fast. Also keep your spacing consistent where it needs to be. That means, that if a car was travelling a certain speed, say 60 miles per hour, then don't have it one frame with super small spacing. Keep it constant.
Good luck man. Your animation is pretty good for the most part. I liked the bases and effects you used, and you did move all the joints so your movements are somewhat good at the moment. :)